The Humboldt MiniLoggers HM-2325A and HM-2330D are simple-to-use, four-channel, stand-alone, digital data loggers specifically designed for use in Soil Testing (Triaxial, Consolidation, Direct Shear, CBR/LBR Unconfined Compression); Asphalt Testing (TSR, Hveem, Flow/Stability), and Cement Testing (Soil/Cement and Cement Cubes).